/*
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.l2j.loginserver;

import java.nio.ByteBuffer;

import net.sf.l2j.loginserver.L2LoginClient.LoginClientState;
import net.sf.l2j.loginserver.clientpackets.AuthGameGuard;
import net.sf.l2j.loginserver.clientpackets.RequestAuthLogin;
import net.sf.l2j.loginserver.clientpackets.RequestServerList;
import net.sf.l2j.loginserver.clientpackets.RequestServerLogin;

import org.mmocore.network.IPacketHandler;
import org.mmocore.network.ReceivablePacket;

/**
 * Handler for packets received by Login Server
 * 
 * @author KenM
 */
public final class L2LoginPacketHandler implements
		IPacketHandler<L2LoginClient> {
	/**
	 * @see org.mmocore.network.IPacketHandler#handlePacket(java.nio.ByteBuffer,
	 *      org.mmocore.interfaces.MMOClient)
	 */
	public ReceivablePacket<L2LoginClient> handlePacket(ByteBuffer buf,
			L2LoginClient client) {
		int opcode = buf.get() & 0xFF;
		ReceivablePacket<L2LoginClient> packet = null;
		LoginClientState state = client.getState();
		switch (state) {
		case CONNECTED:
			if (opcode == 0x07)
				packet = new AuthGameGuard();
			else
				debugOpcode(opcode, state);
			break;
		case AUTHED_GG:
			if (opcode == 0x00)
				packet = new RequestAuthLogin();
			else
				debugOpcode(opcode, state);
			break;
		case AUTHED_LOGIN:
			if (opcode == 0x05)
				packet = new RequestServerList();
			else if (opcode == 0x02)
				packet = new RequestServerLogin();
			else
				debugOpcode(opcode, state);
		}
		return packet;
	}

	private void debugOpcode(int opcode, LoginClientState state) {
		System.out.println("Unknown Opcode: " + opcode + " for state: "
				+ state.name());
	}
}
